Toward perfect homodyne detection of twin vacuum beams

POSTER

Abstract

We demonstrate the use of an optical phase-sensitive amplifier to recover the quantum correlations in twin light beams after degradation due to optical loss and detector efficiency. We use four-wave mixing in hot $^{85}$Rb vapor cell to generate correlated twin beams in a two-mode squeezed vacuum state. We then use a second four-wave mixing cell as our optical phase-sensitive amplifier to amplify one half of the two-mode state, which can compensate for downstream optical loss and restore the nonclassical correlations of the state.

Authors

  • Tian Li

    • Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, MD 20742, USA

  • Travis Horrom

    • Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, MD 20742, USA

  • Brian Anderson

    • Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, MD 20742, USA

  • Paul Lett

    • Quantum Measurement Division, National Institute of Standards and Technology and Joint Quantum Institute, NIST and UMD, Gaithersburg, MD 20899, USA